why we use star and delta connection?why we donot give the
supply directly?
Answer Posted / rakesh
star delta connections r used to reduce the numb of
conducors required for pow transmission. Generally we gen
3ph pow, so there vl b 3 coils in generator 2 gen 3ph pow &
each coil vl have 2 point ie. start & end terminals of
coil. so totally 3*2=6 conductors r req to transmit pow
which increases the transmission cost, so in order to
avoid this v use star delta
| Is This Answer Correct ? | 3 Yes | 12 No |
Post New Answer View All Answers
why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?
For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?
What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?
what is d check in dg 1500kva
what is circuit recombiner and how it is different from circuit breaker
how to extend relay operating timing in 24V dc relay card (without using Timer )
why magnet has north and south poles only why not east and west and why we are considering as north and south poles? why cant we consider as east and west?
what is smartµ grid technology?under coal gassification?
Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection
Load break swicth maintenance procedure.
I want the details about BHEL company examination.Can anyone able to help me please.
Why to keep capacitor bank off while generator running.
If ROC does not lies inside unit circle,then ? a) Fourier transform converges b) Z transform converges c) Hatly transform converges d) Colpit Transform converges.
i need previous entrence exam papers of nhpc.
How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9